Rockwell Automation 1794-ASB/E Remote I/O Adapter Module User Manual - Manual (Page 45)

3–11 Communicating with FLEX I/O Modules
Publication 1794ĆUM009D-EN-P - April 2004
Analog modules in the same group.
Eight terminal bases per adapter (maximum)
Adapter
20128
Each module and adjacent empty base represents 1/2 of an I/O group
Group 0 Group 1
8Ćpoint Compact Addressing - Analog Modules
Adapter
Analog Empty Analog Empty Analog Empty Analog Empty
00 07 10 17 00 07 10 17
0
1
2
3
4
5
6
7
I/O Group
Input Image Table Output Image Table
M0 M1 M2 M3 M4 M5 M6 M7
MCB = Module Control Byte (output data)
MSB = Module Status Byte (input data)
ASB/C
IE8
M0ĆMSB
M4ĆMSB
M2ĆMSB
M6ĆMSB
MCB
MSB
MCB
MSB
IE8 IE8
Compact 8Ćpoint Addressing Example
I/O Group 0 I/O Group 1
- 4 Analog modules = 1/4 logical rack = 2 I/O groups
2 module positions = an I/O group
Legal Module Placement in 16Ćpt Compact Addressing
A 16Ćpoint input module and a 16Ćpoint output module
(or an empty slot) in an I/O group
Note: Shaded areas represent unavailable data
I/O groups 4-7 are available for another adapter.
Note: When using block transfer modules in 16Ćpt compact addressing, address module positions
M0, M2, M4 and M6 as module 0" in a block transfer instruction block; address module positions
M1, M3, M5 and M7 as module 1" in a block transfer instruction block.
An empty slot and any module (or another empty slot)
in an I/O grouop.
A block transfer module and another block transfer module
(or an empty slot) in an I/O group.
IE8
MCB
MSB
MCB
MSB
M0ĆMCB
M4ĆMCB
M2ĆMCB
M6ĆMCB